If the temperature and the acidic level falls, there will be a good chance that your discus fish will not breed and in certain cases, they can even die. As with any fish, your tank should be kept clean at all times. No creature would like to live in a dump. If you notice that your tank s water is getting dirty, you should change it. This will subject your discus fish with high levels of stress, which will eventually cause them to get sick. Discus fish needs clean water and good nutrition in order to thrive. When you are putting tap water in your aquarium, make sure that the water is treated first before you place the discus fish inside. A deep tank is usually the norm, 18 inches would suffice. With the volume of water, most discus fish experts would agree that for each discus fish, 10 gallons would be necessary. To maximize the surface area, a rectangular tank is usually recommended. When buying a tank, the surface area is one of the important considerations. Taking care of discus fish is easy if you only know how to do it properly. It may be hard at first but as you get more experience, everything will become routine and easy to do. The aquarium size is one of the most important things that you need to consider. Discus fish thrives in deep water. So, you may want to get a large tank that is both wide and deep. Discus fish are very temperamental but if you do the necessary research and apply it in taking care of the discus fish in your aquarium, you will be able to have a discus fish that will thrive in your aquarium and also grow happy and healthy. The secret in taking care of discus fish is the water. You need to keep in mind that unlike other fishes that needs no specific water condition to thrive, discus fish will need to live in special tanks with water that is specifically treated to the point that it mimics their natural environment. You also have to remember that discus fish likes to live in large areas of water. So, you may want to buy a larger fish tank in order for you to make sure that the discus fish will be comfortable and not get subjected to a lot of stress. Also, you may want to keep in mind that the water in larger fish tanks are a lot easier to maintain than water in small fish tanks.